513540031 has 2 divisors, whose sum is σ = 513540032. Its totient is φ = 513540030.

The previous prime is 513540023. The next prime is 513540077. The reversal of 513540031 is 130045315.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513540031 - 2³ = 513540023 is a prime.

It is a super-2 number, since 2×513540031² = 527446726878961922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513539984 and 513540011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513540011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256770015 + 256770016.

It is an arithmetic number, because the mean of its divisors is an integer number (256770016).

Almost surely, 2^513540031 is an apocalyptic number.

513540031 is a deficient number, since it is larger than the sum of its proper divisors (1).

513540031 is an equidigital number, since it uses as much as digits as its factorization.

513540031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 513540031 is about 22661.4216456073. The cubic root of 513540031 is about 800.8012966159.

Adding to 513540031 its reverse (130045315), we get a palindrome (643585346).

The spelling of 513540031 in words is "five hundred thirteen million, five hundred forty thousand, thirty-one".